Mono- and Multilayer Adsorption of Aqueous Xanthate on Galena Surfaces

Hagihara, Hitosi

doi:10.1021/j150497a013

Cited by 26 publications

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“…One of us previously studied the behaviour of several kinds of alkyl xanthates on fresh and oxidized cleavage faces of galena, PbS, by the reflexion method of electron diffraction (Hagihara, 1952). This technique was proved to be useful in determining the molecular array of adsorbates in a monolayer produced on the cleavage surface (Hagihara & Uchikoshi, 1954), or in the identification and the orientation determination of oxidation and other reaction products which are formed on mineral surfaces before and after reaction with xanthate solutions (Hagihara, Uchikoshi & Yamashita, 1957;Hagihara, Sakurai & Ikeda, 1964).…”

Section: Introductionmentioning

confidence: 99%

The crystal structure of lead ethyixanthate

Hagihara¹,

Yamashita²

1966

Acta Cryst

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Lead ethylxanthate, Pb(SSCOCH2CH3)2, is monoclinic with a= 13.267+0.016, b=4"301 +0"015, c= 22.722+ 0.016 A; fl= 109°16'+5'; the space group is P2~/c and Z=4. Through the dithiocarbonic ends the two xanthate groups are bonded with the lead atom, with a bond angle of 98.2°+ 0.9 °. The molecule is not planar, although each xanthate group, ignoring the hydrogen atoms, is almost planar. It does not possess a twofold rotation axis passing through the lead atom and it forms an asymmetric unit in the structure. A geometrical interpretation is given of the asymmetrical molecular structure in terms of the rotations of the molecular segments around Pb-S, C-S and O-S single bonds in the crystalline state. The molecules are bound together through van der Waals forces between double-bonded sulphur atoms and between methyl ends of the alkyl groups.

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Section: Introductionmentioning

confidence: 99%

The crystal structure of lead ethyixanthate

Hagihara¹,

Yamashita²

1966

Acta Cryst

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Die Flotation

Moeller

1955

Zeitschrift für Elektrochemie, Berichte der Bunsengesellschaft

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Die Voraussetzungen zur Durchführung des Verfahrens werden erörtert und die Begriffe Sammler, Schäumer, Drücker und Regler definiert. Als Sammler werden hauptsächlich verwendet: Xanthate, Ester der Dithiophosphorsäure u.ä. Ihre Wirkung beruht auf Hydrophobie, die durch die Größe des „Randwinkels”︁ bestimmt wird. Die Anlagerung des Sammlers am Erz kann durch Adsorption oder durch chemische Umsetzungen erklärt werden. Die wichtigsten Flotationsschäumer sind Alkohole, Phenolhomologe, Trialkoxyparaffine u.a. Ihre Wirkungsweise wird erörtert. Drücker sind Cyanide, Chromate u. a.

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Chelating reagents for flotation of sulphide minerals

Marabini

Bárbaro

1990

Sulphide Deposits—their Origin and Processing

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Mono- and Multilayer Adsorption of Aqueous Xanthate on Galena Surfaces

Cited by 26 publications

References 0 publications

The crystal structure of lead ethyixanthate

The crystal structure of lead ethyixanthate

Die Flotation

Chelating reagents for flotation of sulphide minerals

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